Prithvi Engineering Works is a professional manufacturer and exporter of precision forging. It has three precision forging production lines, which can forge small and medium size forging with Max. 7000KGS. And fully precision CNC machining, qualified laboratory with chemical analysis & mechanical properties and NDT test.
Prithvi Engineering works is focused on the manufacturing different types of free forging, open die forging and precision close die forging. From the raw material stock, supply, cutting/sawing, gas (electrical) heating, forging (forming), trimming, heat treatment, NDT test, rough and precision machining, Inspection and test, marking, coating, packing and shipment, Prithvi Engineering works has already developed a whole supply chain.
The products covers from forged valve bodies, flanges, Auto forgings, vessel forgings, Rings, Discs, Hollows, Blocks, special precision forgings & free forgings according to the samples & drawings. Shanxi KSN Precision Forging Technology Development Co., Ltd also can produce the parts according to the domestic & foreign specifications. Prithvi Engineering works is always has stock for different size & grades of carbon, alloy, stainless and super-alloy.
More than 10 years engaging in the forging industry, Prithvi Engineering works has collected a lot of practical forging experiences and technical supports, nearly 95% of the products are exported to Europe, America, middle-east and south-east Asian countries.
High-quality products, On-time-Delivery and good service, rich experience, PEW team have collected a wide & good reputation and
Hot Forging
Hot forging is also called hot die forging by hot forging manufacturers. During the hot die forging process, the deformed metal flows violently and the forging contacts with the die for a long time.
Besides professional cold forging process, cold forging materials, Walkson also provides types of hot forging. Therefore, the mold materials by this forging process flow should have high thermal stability, high temperature strength and hardness, impact toughness, heat fatigue resistance and wear resistance, and be easy to process.
Types of Hot Forging Material
- AISI 1010, AISI 1018, AISI 1020, AISI 1026, AISI 4130, AISI 4140, AISI 4330, AISI 4340, AISI 8620, AISI 8630, AISI 9310, Nitralloy 135,
- Stainless Steel 300 Series
- Grade 302, Grade 304, Grade 304-l, Grade 309, Grade 310, Grade 316, Grade 316-L, Grade 317, Grade 321, Grade 330
- Stainless Steel 400 Series
- Grade 403, Grade 405, Grade 410, Grade 414, Grade 416, Grade 418, Grade 422, Grade 431, Grade 440-A, Grade 440-C
- Precipitation Hardening Grades
- 13-8MO, 15-5 PH, 17-4 PH, 450, 455
- Duplex stainless-steel grades:
- 2205, 2507, F-55
- Monel: 400, K 500
- Nitrolic: 40, 50, 60
Hot Forging Temperature
Hot forging temperature of steel: generally speaking, hot forging temperature ranges from 950°C to 1250°C, which are above the recrystallization temperature. Usually, we can experience good formability (i.e. filling the cavity in the case of forging), low forming forces and almost uniform tensile strength of the workpiece.
Hot Forging Process Flow Chart
Differentiate Between Hot and Cold Forging
| Table 1 Comparison of cold forging and hot forging | ||
| Cold forging | Hot forging | |
| Process temperature | Room temperature | 1 000–1 250°C |
| Material flow stress | High | Low |
| Forging pressure | High | Low |
| Annealing before forging | Necessary | Unnecessary |
| Material deformability | Low | High |
| Shape of forgings | Complex in some cases | Complex |
| Dimensional accuracy of forgings | High | Low |
| Surface condition of forgings | Fine | Oxidized and decarburized |
| Lubricant | Phosphate coating plus metal soap, etc. | Graphite, etc |
Advantages of Hot Forging
The high temperature during the hot forging process causes the material to deform to the highest level and obtain complex 3D geometry. The higher malleability of hot forging components makes them suitable for many configurations. In addition, as a technology, hot forging is more flexible than cold forging because custom parts can be made. The excellent surface quality of hot forging allows for a wide range of finishing jobs such as polishing, coating or painting according to the customer’s specific needs.
Application of Hot Forging
Hot forging is most commonly used in automotive forging applications. Wrought aluminum alloys are becoming more popular as the demand for lightweight construction grows; magnesium is rarely used. A variety of common automotive forgings are applicable to both passenger cars and commercial vehicles; Aside from steel forgings, high-strength and temperature-resistant special materials such as nickel-based and titanium alloys, as well as lightweight construction materials such as wrought aluminum alloys and magnesium, are used in the aerospace sector. Hot forging is not only used in the automotive and aerospace industries. Furthermore, there are a few other important application fields in which hot forgings can shine: Construction industry, Mechanical engineering, Agriculture, Steel construction, Offshore Industry etc.
Alloy Steel Forging
Alloy steel Forging is widely used in the industry, including forging shaft, forging rings, etc. As an alloy steel forging manufacturer, WALKSON provides alloy steel forging with the following advantages:
- High strength, good plasticity and toughness. Due to the effect of alloying elements, its strength is 25% – 50% higher than that of carbon steel forging, its elongation is 15% – 23%, and its impact toughness at room temperature is higher than 60j
- Good weldability. Because of the low carbon content, low alloy element content, good plasticity and low hardenability, not easy to have cracks after Heat treatment (Quench&temper)
- Cold and hot pressure processing performance is good. Because of its good plasticity and small deformation resistance, during the forging manufacturing process it is not easy to produce cracks after pressure processing
- Good corrosion resistance. It has higher corrosion resistance under various atmospheric conditions
Material we can do but not limited to:
- AISI 4130, AISI 4140, AISI 4330, AISI 4340, AISI 8620, AISI 8630, AISI 9310, Nitralloy 135
Stainless Steel Forging
Stainless steel forging, also called the SS forging, is widely used in the industry, including forging shaft, forging rings, etc.
Like our alloy steel forging, the main advantage of stainless steel, produced in the stainless steel forging process, is corrosion resistance or high-temperature resistance. As a stainless steel forging supplier and manufacturer, our company also provides forging stainless services.
Carbon Steel Forging
Carbon steel forging with super toughness and bending strength. The hook is made of super high carbon steel with super toughness and bending strength. The hook has been forged, the hook point is sharp and not easy to break, and the penetrating force is strong.
The surface is treated by special oxidation and electroplating, with super high wear resistance and excellent corrosion resistance. WALKSON, a professional company specializing in both carbon and stainless steel forging process, also provides related forging specification for the convenience of our customers.
Material we can do but not limited to:
AISI 1010, AISI 1018, AISI 1020, AISI 1026 etc..
Cold Forging
Cold forging definition: Cold forging provided by WALKSON cold forging factories is a kind of forming processing for materials below recrystallization temperature, it is forged below recovery temperature. Forging without heating blank is called cold forging.
Most of the cold forging materials are aluminum and some alloys, copper and some alloys, low carbon steel, medium carbon steel and low alloy structural steel with low deformation resistance and good plasticity at room temperature. As one of the reputable cold forging suppliers in China, we provide cold forging with good surface quality and high dimensional accuracy, which can replace some cutting processing.
Cold forging by WALKSON, a professional cold and hot die forging manufacturer, can strengthen the metal and improve the strength of parts. For more information, please refer to our cold forging process flow chart or diagram. Related process videos, pdf or ppt files are also available.
Advantages of Cold Forging
Cold forging is an environmentally friendly manufacturing process in which the workpiece can be formed at high pressure and low temperature. This cold forging process is able to ensure there are no bubbles, pores or any other impurities in the material, resulting in a very high quality cold forging product.
Compared with other manufacturing methods, the main advantages of cold forging are small dimensional tolerances, good surface finish, and low cost materials that can be worked to obtain the required strength and hardened without heat treatment.
Application of Cold Forging
Cold forging is one of the most widely used chip free molding processes and usually does not require machining beyond drilling. The generally accepted cold forging definition is bulk material formed or forged at room temperature without heating the initial slug or intermediate stage.
Cold forging is growing a high popularity in the automotive industry for the manufacture of steering and suspension components, anti-lock braking systems, axles, drill bits, clutch hubs, gears, pinions, pins, steps, and intermediate shafts and sleeves.
Cold Forging Vs. Hot Forging
Cold forging process is a molding process carried out at room temperature，which is cold forging temperature. The advantage of cold forging is that we get a good surface finish for the cold forging product.
While during the hot forging process, heat is applied to soften the sheet metal.
The main difference between hot forging and cold forging is that the high temperature of hot forging gives the metal a finer and more complex shape than cold forging.
Cold Forging Materials:
- Cold forging is the process of plastically deforming a metal material at room temperature while applying massive pressure.
- Other key advantages of the cold forming process, in addition to improved overall material properties, include higher dimensional accuracy than forged parts, excellent surface quality, and no need to apply additional energy into the process, such as extreme temperatures.
- Cold forging materials that can be cold formed at Walkson include, but are not limited to:
- Carbon steels, Alloy steels, Stainless steel, Copper, Aluminum, Bronze, Nickel alloys.
Advantages and Difficulties of Cold Forging Materials
| Advantages | Difficulties |
| Near-net-shape forming | Extensive treatment of the work piece |
| Superior dimensional accuracy when compared to forged parts | Forming degree is lower than with hot forming. |
| Material utilization is extremely high | Complex forms difficult to realize |
| No scaling | Higher tool expenditure |
| High surface quality | |
| Work piece strength is increased through strain hardening. | |
| Expedient grain flow as with hot forming | |
| No heating necessary |
Open-die Forging
Open die forging is a kind of forging method which makes the metal deform freely in all directions between the upper anvil and the lower anvil by open die forging press using the impact force or pressure, and obtains the required shape, size and certain mechanical properties without any restriction.
Besides professional cold forging process, types of hot forging, PEW also provides open and closed die drop forging. As a professional open and closed die drop forging manufacturer, PEW has big open die forging factory and provides different types of open die forging process. For more information of the open die drop forging, please feel free to contact us.
The tools and equipment used in free forging are simple, versatile, and low cost.
Compared with the casting blank, the free forging eliminates the defects of shrinkage cavity, porosity, and air hole, which makes the blank have higher mechanical properties. The open die drop forging service by PEW is simple in shape and flexible in operation. Therefore, it is of great significance in the manufacture of heavy machinery and important parts.
PEW, as a reliable open die forging company, has its own factory and can provide a wide range of open die forging products, such as forging shaft, forging links, propel shaft for heavy equipment.
- Closed-die Forging (Impression-die)
Closed-die forging, also called closed forging, is a kind of forging method that can be achieved by closed die forging press.
Closed die drop precision forging drives a plurality of punches or die cavities, makes the material mainly carry out lateral extrusion deformation flow, enters the die space set on the side, and produces the forging with radial protrusion.
The whole forging process is closed die forging process, also called impression die forging. As a reputable closed and open die drop forging company in China, we can provide such kind of service.
Material we can do but not limited to:
- AISI 1010, AISI 1018, AISI 1020, AISI 1026, AISI 4130, AISI 4140, AISI 4330, AISI 4340, AISI 8620, AISI 8630, AISI 9310, Nitralloy 135,
- Stainless Steel 300 Series
- Grade 302, Grade 304, Grade 304-l, Grade 309, Grade 310, Grade 316, Grade 316-L, Grade 317, Grade 321, Grade 330
- Stainless Steel 400 Series
- Grade 403, Grade 405, Grade 410, Grade 414, Grade 416, Grade 418, Grade 422, Grade 431, Grade 440-A, Grade 440-C
- Precipitation Hardening Grades
- 13-8MO, 15-5 PH, 17-4 PH, 450, 455
- Duplex stainless-steel grades:2205, 2507, F-55
- Monel: 400, K 500
- Nitrolic: 40, 50, 60